src/gtk1/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        bitmap.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "bitmap.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/defs.h"
  18
  19 #include "wx/palette.h"
  20 #include "wx/bitmap.h"
  21 #include "wx/icon.h"
  22 #include "wx/filefn.h"
  23 #include "wx/image.h"
  24 #include "wx/dcmemory.h"
  25 #include "wx/app.h"
  26
  27 #ifdef __WXGTK20__
  28     // need this to get gdk_image_new_bitmap()
  29     #define GDK_ENABLE_BROKEN
  30 #endif
  31
  32 #include <gdk/gdk.h>
  33 #include <gtk/gtk.h>
  34 #include <gdk/gdkx.h>
  35
  36 #ifdef __WXGTK20__
  37     #include <gdk/gdkimage.h>
  38 #else // GTK+ 1.2
  39     #include <gdk/gdkrgb.h>
  40 #endif // GTK+ 2.0/1.2
  41
  42 #include <math.h>
  43
  44 extern void gdk_wx_draw_bitmap     (GdkDrawable  *drawable,
  45                           GdkGC               *gc,
  46                           GdkDrawable  *src,
  47                           gint                xsrc,
  48                           gint                ysrc,
  49                           gint                xdest,
  50                           gint                ydest,
  51                           gint                width,
  52                           gint                height);
  53
  54 //-----------------------------------------------------------------------------
  55 // data
  56 //-----------------------------------------------------------------------------
  57
  58 extern GtkWidget *wxGetRootWindow();
  59
  60 //-----------------------------------------------------------------------------
  61 // wxMask
  62 //-----------------------------------------------------------------------------
  63
  64 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  65
  66 wxMask::wxMask()
  67 {
  68     m_bitmap = (GdkBitmap *) NULL;
  69 }
  70
  71 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  72 {
  73     m_bitmap = (GdkBitmap *) NULL;
  74     Create( bitmap, colour );
  75 }
  76
  77 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  78 {
  79     m_bitmap = (GdkBitmap *) NULL;
  80     Create( bitmap, paletteIndex );
  81 }
  82
  83 wxMask::wxMask( const wxBitmap& bitmap )
  84 {
  85     m_bitmap = (GdkBitmap *) NULL;
  86     Create( bitmap );
  87 }
  88
  89 wxMask::~wxMask()
  90 {
  91     if (m_bitmap)
  92         gdk_bitmap_unref( m_bitmap );
  93 }
  94
  95 bool wxMask::Create( const wxBitmap& bitmap,
  96                      const wxColour& colour )
  97 {
  98     if (m_bitmap)
  99     {
 100         gdk_bitmap_unref( m_bitmap );
 101         m_bitmap = (GdkBitmap*) NULL;
 102     }
 103
 104     wxImage image = bitmap.ConvertToImage();
 105     if (!image.Ok()) return FALSE;
 106
 107     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, image.GetWidth(), image.GetHeight(), 1 );
 108     GdkGC *gc = gdk_gc_new( m_bitmap );
 109
 110     GdkColor color;
 111     color.red = 65000;
 112     color.green = 65000;
 113     color.blue = 65000;
 114     color.pixel = 1;
 115     gdk_gc_set_foreground( gc, &color );
 116     gdk_gc_set_fill( gc, GDK_SOLID );
 117     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
 118
 119     unsigned char *data = image.GetData();
 120     int index = 0;
 121
 122     unsigned char red = colour.Red();
 123     unsigned char green = colour.Green();
 124     unsigned char blue = colour.Blue();
 125
 126     GdkVisual *visual = wxTheApp->GetGdkVisual();
 127
 128     int bpp = visual->depth;
 129     if ((bpp == 16) && (visual->red_mask != 0xf800))
 130         bpp = 15;
 131     if (bpp == 15)
 132     {
 133         red = red & 0xf8;
 134         green = green & 0xf8;
 135         blue = blue & 0xf8;
 136     }
 137     else if (bpp == 16)
 138     {
 139         red = red & 0xf8;
 140         green = green & 0xfc;
 141         blue = blue & 0xf8;
 142     }
 143     else if (bpp == 12)
 144     {
 145         red = red & 0xf0;
 146         green = green & 0xf0;
 147         blue = blue & 0xf0;
 148     }
 149
 150     color.red = 0;
 151     color.green = 0;
 152     color.blue = 0;
 153     color.pixel = 0;
 154     gdk_gc_set_foreground( gc, &color );
 155
 156     for (int j = 0; j < image.GetHeight(); j++)
 157     {
 158         int start_x = -1;
 159         int i;
 160         for (i = 0; i < image.GetWidth(); i++)
 161         {
 162             if ((data[index] == red) &&
 163                 (data[index+1] == green) &&
 164                 (data[index+2] == blue))
 165             {
 166                 if (start_x == -1)
 167                 start_x = i;
 168             }
 169             else
 170             {
 171                 if (start_x != -1)
 172                 {
 173                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 174                     start_x = -1;
 175                 }
 176             }
 177             index += 3;
 178         }
 179         if (start_x != -1)
 180             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 181     }
 182
 183     gdk_gc_unref( gc );
 184
 185     return TRUE;
 186 }
 187
 188 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 189 {
 190     unsigned char r,g,b;
 191     wxPalette *pal = bitmap.GetPalette();
 192
 193     wxCHECK_MSG( pal, FALSE, wxT("Cannot create mask from bitmap without palette") );
 194
 195     pal->GetRGB(paletteIndex, &r, &g, &b);
 196
 197     return Create(bitmap, wxColour(r, g, b));
 198 }
 199
 200 bool wxMask::Create( const wxBitmap& bitmap )
 201 {
 202     if (m_bitmap)
 203     {
 204         gdk_bitmap_unref( m_bitmap );
 205         m_bitmap = (GdkBitmap*) NULL;
 206     }
 207
 208     if (!bitmap.Ok()) return FALSE;
 209
 210     wxCHECK_MSG( bitmap.GetBitmap(), FALSE, wxT("Cannot create mask from colour bitmap") );
 211
 212     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 213
 214     if (!m_bitmap) return FALSE;
 215
 216     GdkGC *gc = gdk_gc_new( m_bitmap );
 217
 218     gdk_wx_draw_bitmap( m_bitmap, gc, bitmap.GetBitmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
 219
 220     gdk_gc_unref( gc );
 221
 222     return TRUE;
 223 }
 224
 225 GdkBitmap *wxMask::GetBitmap() const
 226 {
 227     return m_bitmap;
 228 }
 229
 230 //-----------------------------------------------------------------------------
 231 // wxBitmap
 232 //-----------------------------------------------------------------------------
 233
 234 class wxBitmapRefData: public wxObjectRefData
 235 {
 236 public:
 237     wxBitmapRefData();
 238     ~wxBitmapRefData();
 239
 240     GdkPixmap      *m_pixmap;
 241     GdkBitmap      *m_bitmap;
 242     wxMask         *m_mask;
 243     int             m_width;
 244     int             m_height;
 245     int             m_bpp;
 246     wxPalette      *m_palette;
 247 };
 248
 249 wxBitmapRefData::wxBitmapRefData()
 250 {
 251     m_pixmap = (GdkPixmap *) NULL;
 252     m_bitmap = (GdkBitmap *) NULL;
 253     m_mask = (wxMask *) NULL;
 254     m_width = 0;
 255     m_height = 0;
 256     m_bpp = 0;
 257     m_palette = (wxPalette *) NULL;
 258 }
 259
 260 wxBitmapRefData::~wxBitmapRefData()
 261 {
 262     if (m_pixmap)
 263         gdk_pixmap_unref( m_pixmap );
 264     if (m_bitmap)
 265         gdk_bitmap_unref( m_bitmap );
 266     delete m_mask;
 267     delete m_palette;
 268 }
 269
 270 //-----------------------------------------------------------------------------
 271
 272 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 273
 274 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 275
 276 wxBitmap::wxBitmap()
 277 {
 278 }
 279
 280 wxBitmap::wxBitmap( int width, int height, int depth )
 281 {
 282     Create( width, height, depth );
 283 }
 284
 285 bool wxBitmap::Create( int width, int height, int depth )
 286 {
 287     UnRef();
 288
 289     if ( width <= 0 || height <= 0 )
 290     {
 291         return false;
 292     }
 293
 294     GdkVisual *visual = wxTheApp->GetGdkVisual();
 295
 296     if (depth == -1)
 297         depth = visual->depth;
 298
 299     wxCHECK_MSG( (depth == visual->depth) || (depth == 1), FALSE,
 300                     wxT("invalid bitmap depth") )
 301
 302     m_refData = new wxBitmapRefData();
 303     M_BMPDATA->m_mask = (wxMask *) NULL;
 304     M_BMPDATA->m_width = width;
 305     M_BMPDATA->m_height = height;
 306     if (depth == 1)
 307     {
 308         M_BMPDATA->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 309         M_BMPDATA->m_bpp = 1;
 310     }
 311     else
 312     {
 313         M_BMPDATA->m_pixmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, depth );
 314         M_BMPDATA->m_bpp = visual->depth;
 315     }
 316
 317     return Ok();
 318 }
 319
 320 bool wxBitmap::CreateFromXpm( const char **bits )
 321 {
 322     UnRef();
 323
 324     wxCHECK_MSG( bits != NULL, FALSE, wxT("invalid bitmap data") )
 325
 326     GdkVisual *visual = wxTheApp->GetGdkVisual();
 327
 328     m_refData = new wxBitmapRefData();
 329
 330     GdkBitmap *mask = (GdkBitmap*) NULL;
 331
 332     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxGetRootWindow()->window, &mask, NULL, (gchar **) bits );
 333
 334     wxCHECK_MSG( M_BMPDATA->m_pixmap, FALSE, wxT("couldn't create pixmap") );
 335
 336     if (mask)
 337     {
 338         M_BMPDATA->m_mask = new wxMask();
 339         M_BMPDATA->m_mask->m_bitmap = mask;
 340     }
 341
 342     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 343
 344     M_BMPDATA->m_bpp = visual->depth;  // Can we get a different depth from create_from_xpm_d() ?
 345
 346     return TRUE;
 347 }
 348
 349 wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
 350 {
 351     wxCHECK_MSG( Ok(), wxNullBitmap, wxT("invalid bitmap") );
 352
 353     if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 354         return *this;
 355
 356     GdkImage *img = (GdkImage*) NULL;
 357     if (GetPixmap())
 358         img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
 359     else if (GetBitmap())
 360         img = gdk_image_get( GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 361     else
 362         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 363
 364     wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
 365
 366     wxBitmap bmp;
 367     int bpp = -1;
 368
 369     int width = wxMax(newx, 1);
 370     int height = wxMax(newy, 1);
 371     width = wxMin(width, clipwidth);
 372     height = wxMin(height, clipheight);
 373
 374     GdkGC *gc = NULL;
 375     GdkPixmap *dstpix = NULL;
 376     if (GetPixmap())
 377     {
 378         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 379         if (visual == NULL)
 380             visual = wxTheApp->GetGdkVisual();
 381
 382         bpp = visual->depth;
 383         bmp = wxBitmap(width,height,bpp);
 384         dstpix = bmp.GetPixmap();
 385         gc = gdk_gc_new( dstpix );
 386     }
 387
 388     char *dst = NULL;
 389     long dstbyteperline = 0;
 390
 391     if (GetBitmap())
 392     {
 393         bpp = 1;
 394         dstbyteperline = width/8*M_BMPDATA->m_bpp;
 395         if (width*M_BMPDATA->m_bpp % 8 != 0)
 396             dstbyteperline++;
 397         dst = (char*) malloc(dstbyteperline*height);
 398     }
 399
 400     // be careful to use the right scaling factor
 401     float scx = (float)M_BMPDATA->m_width/(float)newx;
 402     float scy = (float)M_BMPDATA->m_height/(float)newy;
 403     // prepare accel-tables
 404     int *tablex = (int *)calloc(width,sizeof(int));
 405     int *tabley = (int *)calloc(height,sizeof(int));
 406
 407     // accel table filled with clipped values
 408     for (int x = 0; x < width; x++)
 409         tablex[x] = (int) (scx * (x+clipx));
 410     for (int y = 0; y < height; y++)
 411         tabley[y] = (int) (scy * (y+clipy));
 412
 413     // Main rescaling routine starts here
 414     for (int h = 0; h < height; h++)
 415     {
 416         char outbyte = 0;
 417         int old_x = -1;
 418         guint32 old_pixval;
 419
 420         for (int w=0; w<width; w++)
 421         {
 422             guint32 pixval;
 423             int x = tablex[w];
 424             if (x == old_x)
 425                 pixval = old_pixval;
 426             else
 427                 pixval = gdk_image_get_pixel( img, x, tabley[h] );
 428
 429             if (bpp==1)
 430             {
 431                 if (!pixval)
 432                 {
 433                     char bit=1;
 434                     char shift = bit << w % 8;
 435                     outbyte |= shift;
 436                 }
 437
 438                 if ((w+1)%8==0)
 439                 {
 440                     dst[h*dstbyteperline+w/8]=~outbyte;
 441                     outbyte = 0;
 442                 }
 443             }
 444             else
 445             {
 446                 GdkColor col;
 447                 col.pixel = pixval;
 448                 gdk_gc_set_foreground( gc, &col );
 449                 gdk_draw_point( dstpix, gc, w, h);
 450             }
 451         }
 452
 453         // do not forget the last byte
 454         if (bpp == 1)
 455             dst[h*dstbyteperline+width/8] = ~outbyte;
 456     }
 457
 458     gdk_image_destroy( img );
 459     if (gc) gdk_gc_unref( gc );
 460
 461     if (bpp == 1)
 462     {
 463         bmp = wxBitmap( (const char *)dst, width, height, 1 );
 464         free( dst );
 465     }
 466
 467     if (GetMask())
 468     {
 469         bpp = 1;
 470         dstbyteperline = width/8*bpp;
 471         if (width*bpp % 8 != 0)
 472             dstbyteperline++;
 473         dst = (char*) malloc(dstbyteperline*height);
 474         img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 475
 476         for (int h = 0; h < height; h++)
 477         {
 478             char outbyte = 0;
 479
 480             for (int w=0; w<width; w++)
 481             {
 482                 guint32 pixval = gdk_image_get_pixel( img, tablex[w], tabley[h] );
 483                 if (pixval)
 484                 {
 485                     char bit=1;
 486                     char shift = bit << w % 8;
 487                     outbyte |= shift;
 488                 }
 489
 490                 if ((w+1)%8==0)
 491                 {
 492                     dst[h*dstbyteperline+w/8]=~outbyte;
 493                     outbyte = 0;
 494                 }
 495             }
 496
 497             // do not forget the last byte
 498             if (bpp == 1)
 499                 dst[h*dstbyteperline+width/8] = ~outbyte;
 500         }
 501
 502         wxBitmap mask_bmp( (const char *)dst, width, height, 1 );
 503         wxMask* mask = new wxMask(mask_bmp);
 504         bmp.SetMask(mask);
 505
 506         free( dst );
 507         gdk_image_destroy( img );
 508     }
 509
 510     free( tablex );
 511     free( tabley );
 512
 513     return bmp;
 514 }
 515
 516 bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
 517 {
 518     UnRef();
 519
 520     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
 521     wxCHECK_MSG( depth == -1 || depth == 1, FALSE, wxT("invalid bitmap depth") )
 522
 523     int width = image.GetWidth();
 524     int height = image.GetHeight();
 525
 526     if ( width <= 0 || height <= 0 )
 527     {
 528         return false;
 529     }
 530
 531     m_refData = new wxBitmapRefData();
 532
 533     SetHeight( height );
 534     SetWidth( width );
 535
 536     // ------
 537     // conversion to mono bitmap:
 538     // ------
 539     if (depth == 1)
 540     {
 541         SetBitmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 542
 543         SetDepth( 1 );
 544
 545         GdkVisual *visual = wxTheApp->GetGdkVisual();
 546
 547         // Create picture image
 548
 549         unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 550
 551         GdkImage *data_image =
 552             gdk_image_new_bitmap( visual, data_data, width, height );
 553
 554         // Create mask image
 555
 556         GdkImage *mask_image = (GdkImage*) NULL;
 557
 558         if (image.HasMask())
 559         {
 560             unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 561
 562             mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 563
 564             wxMask *mask = new wxMask();
 565             mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 566
 567             SetMask( mask );
 568         }
 569
 570         int r_mask = image.GetMaskRed();
 571         int g_mask = image.GetMaskGreen();
 572         int b_mask = image.GetMaskBlue();
 573
 574         unsigned char* data = image.GetData();
 575
 576         int index = 0;
 577         for (int y = 0; y < height; y++)
 578         {
 579             for (int x = 0; x < width; x++)
 580             {
 581                 int r = data[index];
 582                 index++;
 583                 int g = data[index];
 584                 index++;
 585                 int b = data[index];
 586                 index++;
 587
 588                 if (image.HasMask())
 589                 {
 590                     if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 591                         gdk_image_put_pixel( mask_image, x, y, 1 );
 592                     else
 593                         gdk_image_put_pixel( mask_image, x, y, 0 );
 594                 }
 595
 596                 if ((r == 255) && (b == 255) && (g == 255))
 597                     gdk_image_put_pixel( data_image, x, y, 1 );
 598                 else
 599                     gdk_image_put_pixel( data_image, x, y, 0 );
 600
 601             } // for
 602         }  // for
 603
 604         // Blit picture
 605
 606         GdkGC *data_gc = gdk_gc_new( GetBitmap() );
 607
 608         gdk_draw_image( GetBitmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 609
 610         gdk_image_destroy( data_image );
 611         gdk_gc_unref( data_gc );
 612
 613         // Blit mask
 614
 615         if (image.HasMask())
 616         {
 617             GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 618
 619             gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 620
 621             gdk_image_destroy( mask_image );
 622             gdk_gc_unref( mask_gc );
 623         }
 624     }
 625
 626     // ------
 627     // conversion to colour bitmap:
 628     // ------
 629     else
 630     {
 631         SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 632
 633         GdkVisual *visual = wxTheApp->GetGdkVisual();
 634
 635         int bpp = visual->depth;
 636
 637         SetDepth( bpp );
 638
 639         if ((bpp == 16) && (visual->red_mask != 0xf800))
 640             bpp = 15;
 641         else if (bpp < 8)
 642             bpp = 8;
 643
 644         // We handle 8-bit bitmaps ourselves using the colour cube, 12-bit
 645         // visuals are not supported by GDK so we do these ourselves, too.
 646         // 15-bit and 16-bit should actually work and 24-bit certainly does.
 647 #ifdef __sgi
 648         if (!image.HasMask() && (bpp > 16))
 649 #else
 650         if (!image.HasMask() && (bpp > 12))
 651 #endif
 652         {
 653             static bool s_hasInitialized = FALSE;
 654
 655             if (!s_hasInitialized)
 656             {
 657                 gdk_rgb_init();
 658                 s_hasInitialized = TRUE;
 659             }
 660
 661             GdkGC *gc = gdk_gc_new( GetPixmap() );
 662
 663             gdk_draw_rgb_image( GetPixmap(),
 664                                 gc,
 665                                 0, 0,
 666                                 width, height,
 667                                 GDK_RGB_DITHER_NONE,
 668                                 image.GetData(),
 669                                 width*3 );
 670
 671             gdk_gc_unref( gc );
 672             return TRUE;
 673         }
 674
 675         // Create picture image
 676
 677         GdkImage *data_image =
 678             gdk_image_new( GDK_IMAGE_FASTEST, visual, width, height );
 679
 680         // Create mask image
 681
 682         GdkImage *mask_image = (GdkImage*) NULL;
 683
 684         if (image.HasMask())
 685         {
 686             unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 687
 688             mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 689
 690             wxMask *mask = new wxMask();
 691             mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 692
 693             SetMask( mask );
 694         }
 695
 696         // Render
 697
 698         enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
 699         byte_order b_o = RGB;
 700
 701         if (bpp > 8)
 702         {
 703             if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
 704             else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RBG;
 705             else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
 706             else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
 707             else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
 708             else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
 709         }
 710
 711         int r_mask = image.GetMaskRed();
 712         int g_mask = image.GetMaskGreen();
 713         int b_mask = image.GetMaskBlue();
 714
 715         unsigned char* data = image.GetData();
 716
 717         int index = 0;
 718         for (int y = 0; y < height; y++)
 719         {
 720             for (int x = 0; x < width; x++)
 721             {
 722                 int r = data[index];
 723                 index++;
 724                 int g = data[index];
 725                 index++;
 726                 int b = data[index];
 727                 index++;
 728
 729                 if (image.HasMask())
 730                 {
 731                     if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 732                         gdk_image_put_pixel( mask_image, x, y, 1 );
 733                     else
 734                         gdk_image_put_pixel( mask_image, x, y, 0 );
 735                 }
 736
 737                 switch (bpp)
 738                 {
 739                     case 8:
 740                     {
 741                         int pixel = -1;
 742                         if (wxTheApp->m_colorCube)
 743                         {
 744                             pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
 745                         }
 746                         else
 747                         {
 748                             GdkColormap *cmap = gtk_widget_get_default_colormap();
 749                             GdkColor *colors = cmap->colors;
 750                             int max = 3 * (65536);
 751
 752                             for (int i = 0; i < cmap->size; i++)
 753                             {
 754                                 int rdiff = (r << 8) - colors[i].red;
 755                                 int gdiff = (g << 8) - colors[i].green;
 756                                 int bdiff = (b << 8) - colors[i].blue;
 757                                 int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 758                                 if (sum < max) { pixel = i; max = sum; }
 759                             }
 760                         }
 761
 762                         gdk_image_put_pixel( data_image, x, y, pixel );
 763
 764                         break;
 765                     }
 766                     case 12:  // SGI only
 767                     {
 768                         guint32 pixel = 0;
 769                         switch (b_o)
 770                         {
 771                             case RGB: pixel = ((r & 0xf0) << 4) | (g & 0xf0) | ((b & 0xf0) >> 4); break;
 772                             case RBG: pixel = ((r & 0xf0) << 4) | (b & 0xf0) | ((g & 0xf0) >> 4); break;
 773                             case GRB: pixel = ((g & 0xf0) << 4) | (r & 0xf0) | ((b & 0xf0) >> 4); break;
 774                             case GBR: pixel = ((g & 0xf0) << 4) | (b & 0xf0) | ((r & 0xf0) >> 4); break;
 775                             case BRG: pixel = ((b & 0xf0) << 4) | (r & 0xf0) | ((g & 0xf0) >> 4); break;
 776                             case BGR: pixel = ((b & 0xf0) << 4) | (g & 0xf0) | ((r & 0xf0) >> 4); break;
 777                         }
 778                         gdk_image_put_pixel( data_image, x, y, pixel );
 779                         break;
 780                     }
 781                     case 15:
 782                     {
 783                         guint32 pixel = 0;
 784                         switch (b_o)
 785                         {
 786                             case RGB: pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 787                             case RBG: pixel = ((r & 0xf8) << 7) | ((b & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 788                             case GRB: pixel = ((g & 0xf8) << 7) | ((r & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 789                             case GBR: pixel = ((g & 0xf8) << 7) | ((b & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 790                             case BRG: pixel = ((b & 0xf8) << 7) | ((r & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 791                             case BGR: pixel = ((b & 0xf8) << 7) | ((g & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 792                         }
 793                         gdk_image_put_pixel( data_image, x, y, pixel );
 794                         break;
 795                     }
 796                     case 16:
 797                     {
 798                         // I actually don't know if for 16-bit displays, it is alway the green
 799                         // component or the second component which has 6 bits.
 800                         guint32 pixel = 0;
 801                         switch (b_o)
 802                         {
 803                             case RGB: pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 804                             case RBG: pixel = ((r & 0xf8) << 8) | ((b & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 805                             case GRB: pixel = ((g & 0xf8) << 8) | ((r & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 806                             case GBR: pixel = ((g & 0xf8) << 8) | ((b & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 807                             case BRG: pixel = ((b & 0xf8) << 8) | ((r & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 808                             case BGR: pixel = ((b & 0xf8) << 8) | ((g & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 809                         }
 810                         gdk_image_put_pixel( data_image, x, y, pixel );
 811                         break;
 812                     }
 813                     case 32:
 814                     case 24:
 815                     {
 816                         guint32 pixel = 0;
 817                         switch (b_o)
 818                         {
 819                             case RGB: pixel = (r << 16) | (g << 8) | b; break;
 820                             case RBG: pixel = (r << 16) | (b << 8) | g; break;
 821                             case BRG: pixel = (b << 16) | (r << 8) | g; break;
 822                             case BGR: pixel = (b << 16) | (g << 8) | r; break;
 823                             case GRB: pixel = (g << 16) | (r << 8) | b; break;
 824                             case GBR: pixel = (g << 16) | (b << 8) | r; break;
 825                         }
 826                         gdk_image_put_pixel( data_image, x, y, pixel );
 827                     }
 828                     default: break;
 829                 }
 830             } // for
 831         }  // for
 832
 833         // Blit picture
 834
 835         GdkGC *data_gc = gdk_gc_new( GetPixmap() );
 836
 837         gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 838
 839         gdk_image_destroy( data_image );
 840         gdk_gc_unref( data_gc );
 841
 842         // Blit mask
 843
 844         if (image.HasMask())
 845         {
 846             GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 847
 848             gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 849
 850             gdk_image_destroy( mask_image );
 851             gdk_gc_unref( mask_gc );
 852         }
 853     }
 854
 855     return TRUE;
 856 }
 857
 858 wxImage wxBitmap::ConvertToImage() const
 859 {
 860     // the colour used as transparent one in wxImage and the one it is replaced
 861     // with when it really occurs in the bitmap
 862     static const int MASK_RED = 1;
 863     static const int MASK_GREEN = 2;
 864     static const int MASK_BLUE = 3;
 865     static const int MASK_BLUE_REPLACEMENT = 2;
 866
 867     wxImage image;
 868
 869     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 870
 871     GdkImage *gdk_image = (GdkImage*) NULL;
 872     if (GetPixmap())
 873     {
 874         gdk_image = gdk_image_get( GetPixmap(),
 875                                    0, 0,
 876                                    GetWidth(), GetHeight() );
 877     }
 878     else if (GetBitmap())
 879     {
 880         gdk_image = gdk_image_get( GetBitmap(),
 881                                    0, 0,
 882                                    GetWidth(), GetHeight() );
 883     }
 884     else
 885     {
 886         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 887     }
 888
 889     wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
 890
 891     image.Create( GetWidth(), GetHeight() );
 892     char unsigned *data = image.GetData();
 893
 894     if (!data)
 895     {
 896         gdk_image_destroy( gdk_image );
 897         wxFAIL_MSG( wxT("couldn't create image") );
 898         return wxNullImage;
 899     }
 900
 901     GdkImage *gdk_image_mask = (GdkImage*) NULL;
 902     if (GetMask())
 903     {
 904         gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
 905                                         0, 0,
 906                                         GetWidth(), GetHeight() );
 907
 908         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
 909     }
 910
 911     int bpp = -1;
 912     int red_shift_right = 0;
 913     int green_shift_right = 0;
 914     int blue_shift_right = 0;
 915     int red_shift_left = 0;
 916     int green_shift_left = 0;
 917     int blue_shift_left = 0;
 918     bool use_shift = FALSE;
 919
 920     if (GetPixmap())
 921     {
 922         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 923         if (visual == NULL)
 924             visual = wxTheApp->GetGdkVisual();
 925
 926         bpp = visual->depth;
 927         if (bpp == 16)
 928             bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
 929         red_shift_right = visual->red_shift;
 930         red_shift_left = 8-visual->red_prec;
 931         green_shift_right = visual->green_shift;
 932         green_shift_left = 8-visual->green_prec;
 933         blue_shift_right = visual->blue_shift;
 934         blue_shift_left = 8-visual->blue_prec;
 935
 936         use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
 937     }
 938     if (GetBitmap())
 939     {
 940         bpp = 1;
 941     }
 942
 943
 944     GdkColormap *cmap = gtk_widget_get_default_colormap();
 945
 946     long pos = 0;
 947     for (int j = 0; j < GetHeight(); j++)
 948     {
 949         for (int i = 0; i < GetWidth(); i++)
 950         {
 951             wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
 952             if (bpp == 1)
 953             {
 954                 if (pixel == 0)
 955                 {
 956                     data[pos]   = 0;
 957                     data[pos+1] = 0;
 958                     data[pos+2] = 0;
 959                 }
 960                 else
 961                 {
 962                     data[pos]   = 255;
 963                     data[pos+1] = 255;
 964                     data[pos+2] = 255;
 965                 }
 966             }
 967             else if (use_shift)
 968             {
 969                 data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
 970                 data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
 971                 data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
 972             }
 973             else if (cmap->colors)
 974             {
 975                 data[pos] =   cmap->colors[pixel].red   >> 8;
 976                 data[pos+1] = cmap->colors[pixel].green >> 8;
 977                 data[pos+2] = cmap->colors[pixel].blue  >> 8;
 978             }
 979             else
 980             {
 981                 wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
 982             }
 983
 984             if (gdk_image_mask)
 985             {
 986                 int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
 987                 if (mask_pixel == 0)
 988                 {
 989                     data[pos] = MASK_RED;
 990                     data[pos+1] = MASK_GREEN;
 991                     data[pos+2] = MASK_BLUE;
 992                 }
 993                 else if ( data[pos] == MASK_RED &&
 994                             data[pos+1] == MASK_GREEN &&
 995                                 data[pos+2] == MASK_BLUE )
 996                 {
 997                     data[pos+2] = MASK_BLUE_REPLACEMENT;
 998                 }
 999             }
1000
1001             pos += 3;
1002         }
1003     }
1004
1005     gdk_image_destroy( gdk_image );
1006     if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
1007
1008     return image;
1009 }
1010
1011 wxBitmap::wxBitmap( const wxBitmap& bmp )
1012         : wxGDIObject()
1013 {
1014     Ref( bmp );
1015 }
1016
1017 wxBitmap::wxBitmap( const wxString &filename, int type )
1018 {
1019     LoadFile( filename, type );
1020 }
1021
1022 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
1023 {
1024     if ( width > 0 && height > 0 )
1025     {
1026         m_refData = new wxBitmapRefData();
1027
1028         M_BMPDATA->m_mask = (wxMask *) NULL;
1029         M_BMPDATA->m_bitmap = gdk_bitmap_create_from_data
1030                               (
1031                                 wxGetRootWindow()->window,
1032                                 (gchar *) bits,
1033                                 width,
1034                                 height
1035                               );
1036         M_BMPDATA->m_width = width;
1037         M_BMPDATA->m_height = height;
1038         M_BMPDATA->m_bpp = 1;
1039
1040         wxASSERT_MSG( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
1041     }
1042 }
1043
1044 wxBitmap::~wxBitmap()
1045 {
1046 }
1047
1048 wxBitmap& wxBitmap::operator = ( const wxBitmap& bmp )
1049 {
1050     if ( m_refData != bmp.m_refData )
1051         Ref( bmp );
1052
1053     return *this;
1054 }
1055
1056 bool wxBitmap::operator == ( const wxBitmap& bmp ) const
1057 {
1058     return m_refData == bmp.m_refData;
1059 }
1060
1061 bool wxBitmap::operator != ( const wxBitmap& bmp ) const
1062 {
1063     return m_refData != bmp.m_refData;
1064 }
1065
1066 bool wxBitmap::Ok() const
1067 {
1068     return (m_refData != NULL);
1069 }
1070
1071 int wxBitmap::GetHeight() const
1072 {
1073     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1074
1075     return M_BMPDATA->m_height;
1076 }
1077
1078 int wxBitmap::GetWidth() const
1079 {
1080     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1081
1082     return M_BMPDATA->m_width;
1083 }
1084
1085 int wxBitmap::GetDepth() const
1086 {
1087     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1088
1089     return M_BMPDATA->m_bpp;
1090 }
1091
1092 wxMask *wxBitmap::GetMask() const
1093 {
1094     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1095
1096     return M_BMPDATA->m_mask;
1097 }
1098
1099 void wxBitmap::SetMask( wxMask *mask )
1100 {
1101     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
1102
1103     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
1104
1105     M_BMPDATA->m_mask = mask;
1106 }
1107
1108 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
1109 {
1110     *this = icon;
1111     return TRUE;
1112 }
1113
1114 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1115 {
1116     wxCHECK_MSG( Ok() &&
1117                  (rect.x >= 0) && (rect.y >= 0) &&
1118                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
1119                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1120
1121     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
1122     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1123
1124     if (ret.GetPixmap())
1125     {
1126         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1127         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1128         gdk_gc_destroy( gc );
1129     }
1130     else
1131     {
1132         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
1133         gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1134         gdk_gc_destroy( gc );
1135     }
1136
1137     if (GetMask())
1138     {
1139         wxMask *mask = new wxMask;
1140         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
1141
1142         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
1143         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, 0, 0, rect.x, rect.y, rect.width, rect.height );
1144         gdk_gc_destroy( gc );
1145
1146         ret.SetMask( mask );
1147     }
1148
1149     return ret;
1150 }
1151
1152 bool wxBitmap::SaveFile( const wxString &name, int type, wxPalette *WXUNUSED(palette) )
1153 {
1154     wxCHECK_MSG( Ok(), FALSE, wxT("invalid bitmap") );
1155
1156     // Try to save the bitmap via wxImage handlers:
1157     {
1158         wxImage image = ConvertToImage();
1159         if (image.Ok()) return image.SaveFile( name, type );
1160     }
1161
1162     return FALSE;
1163 }
1164
1165 bool wxBitmap::LoadFile( const wxString &name, int type )
1166 {
1167     UnRef();
1168
1169     if (!wxFileExists(name))
1170         return FALSE;
1171
1172     GdkVisual *visual = wxTheApp->GetGdkVisual();
1173
1174     if (type == wxBITMAP_TYPE_XPM)
1175     {
1176         m_refData = new wxBitmapRefData();
1177
1178         GdkBitmap *mask = (GdkBitmap*) NULL;
1179
1180         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
1181                               (
1182                                 wxGetRootWindow()->window,
1183                                 &mask,
1184                                 NULL,
1185                                 name.fn_str()
1186                               );
1187
1188         if (mask)
1189         {
1190            M_BMPDATA->m_mask = new wxMask();
1191            M_BMPDATA->m_mask->m_bitmap = mask;
1192         }
1193
1194         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
1195
1196         M_BMPDATA->m_bpp = visual->depth;
1197     }
1198     else // try if wxImage can load it
1199     {
1200         wxImage image;
1201         if ( !image.LoadFile( name, type ) || !image.Ok() )
1202             return FALSE;
1203
1204         *this = wxBitmap(image);
1205     }
1206
1207     return TRUE;
1208 }
1209
1210 wxPalette *wxBitmap::GetPalette() const
1211 {
1212     if (!Ok())
1213         return (wxPalette *) NULL;
1214
1215     return M_BMPDATA->m_palette;
1216 }
1217
1218 void wxBitmap::SetHeight( int height )
1219 {
1220     if (!m_refData)
1221         m_refData = new wxBitmapRefData();
1222
1223     M_BMPDATA->m_height = height;
1224 }
1225
1226 void wxBitmap::SetWidth( int width )
1227 {
1228     if (!m_refData)
1229         m_refData = new wxBitmapRefData();
1230
1231     M_BMPDATA->m_width = width;
1232 }
1233
1234 void wxBitmap::SetDepth( int depth )
1235 {
1236     if (!m_refData)
1237         m_refData = new wxBitmapRefData();
1238
1239     M_BMPDATA->m_bpp = depth;
1240 }
1241
1242 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1243 {
1244     if (!m_refData)
1245         m_refData = new wxBitmapRefData();
1246
1247     M_BMPDATA->m_pixmap = pixmap;
1248 }
1249
1250 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
1251 {
1252     if (!m_refData)
1253         m_refData = new wxBitmapRefData();
1254
1255     M_BMPDATA->m_bitmap = bitmap;
1256 }
1257
1258 GdkPixmap *wxBitmap::GetPixmap() const
1259 {
1260     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
1261
1262     return M_BMPDATA->m_pixmap;
1263 }
1264
1265 GdkBitmap *wxBitmap::GetBitmap() const
1266 {
1267     wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, wxT("invalid bitmap") );
1268
1269     return M_BMPDATA->m_bitmap;
1270 }